Mineral Based Human Made Alloy

Stainless Steel Spoon

Iron-Chromium Alloy (Fe + Cr + Ni)

Not a geological specimen

N/A (man-made object)

Rose Gold (Copper-Gold Alloy)

Aurum-Cuprum Alloy (Au-Cu)

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Sea Glass

Man-made vitreous material (silica-based glass)

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Concrete rubble

Anthropogenic conglomerate

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Native Silver

Silver (Ag)

Engineered Quartz Stone

Agglomerated Quartz (SiO2 + Polymer Resin)

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Note: Item is not a geological specimen

Homo sapiens (Dermal Appendage: Pilus)

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Industrial Slag

Anthropogenic Vitreous Slag

Red Painted Rock

Artificial Coated Lithic Fragment

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Painted Sandstone

Sandstone (clastic sedimentary rock) with acrylic/artistic coating

Asphalt Concrete

Bituminous Concrete

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Blue Goldstone

Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)

Sandstone Concretion

Sedimentary concretion

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Crushed Stone / Gravel

Aggregatus saxum (variable mineral composition)

Sandstone

Arenite (SiO2 based)

Breccia

Breccia

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Sea Glass

Amorphous silicon dioxide (glass)

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Chert Arrowhead (Jasper)

Chert (Cryptocrystalline Quartz, SiO2)

Pet Rock (Man-made Quartzite or Granite Cobble)

Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica